Improved sffilng-bed bottom



@einen tetes [strat ffice.,

ABRAMWALLAGE Wetsuit, or BUNKER uinniLLiNois.

LettersPatent No. 76,575, dateolflprz'l 7, 1868.

IMPROVE!) SPRING-BED BOTTOM.

TO ALL PERSONS TQ WHOM THESE PRESENTS'SHALL COME:

Bc it known that I, ABRAM WALLACE WRIGHT, of Bunker Hill, in the county of- Macoupimand State of Illinois, have made a new und useful invention havingreference to Bed-Bottoms; and I do hereby declare the same to be fully described in the following specification, and represented in Athe accompanying drawings, of which- Figure 1 denotes la' top view,

Figure 2 1i. transverse section, and

Figure 3 a longitudinal section-of a bedstead provided with my invention.

Figure4 is a top view,

Figure 5 a side elevation, and l Figure 6ta rear elevation of one of thewire springs used by me for supporting the slats of such bedstead.

In such drawings, A denotes a bedste'ad, and B B, 86e., its series of slats for supporting the bedding These slats'are represented as extending transversely across the bedstead,.and parallel to each other. They may, however, be arranged lengthwise of the bedstead, and be supported'. by springs applied to the head and foot-rails a a, instead of to the side-rails b b, as exhibited in the drawings.

Each ofthe said slats, at or near each extremityof it, I supportby means of a springxc, of wire, formed or bent in manner as represented in figs. 4, 5, and 6, such spring beingisuspended at theibendsc c of its arms,

d d, from two screws or pins, e e, by means of loops,ff. The said pins'or screws, c e, are inserted in the bed-p stead side-rail b, so'as to project from its inner surface, and each-pair of such pins belonging toca-.ch spring, I usually arrange at a distance apart somewhat less than are the extreme'bends of the 'arms of the-spring, when at rest or in their normal condition, thatis, without any weight on them to depress them. By this arrangement ofthe pins, the spring will operate to better advantage than it would were the pins to be arranged directlyover the said bends of the arms of thespring.

The spring C consists of two spiral or helical coils, gg, arranged withtheir'axes parallel, or about so, and

connected by a bow, h, bent back or at ai right angle,'in manner as shown `at z'. From these coils g g, arms d d extend and cross one another, and are bent as shownat -c c.' The spring is applied to a s'latl by inserting the latter in. n. loop oi' the spring, so that the slat may rest on the twol coils, a pin,r 7c, inserted in theslat within the bow ofthe spring, serving to h'old the-spring and slat in connection. By such construction of each of the Springs, and arrangement of the pins, loops, and spring, the slat will be held firmly in its proper place during the time the pressure` upon it is the greatest. i y

The peculiar combination or" the spring causes the coils, when the spring is depressed, to roll upon the slat without'producing any unpleasant or creaking sound, such as would be likelyto result were the springs to rest or slide on the slat. AEach' coil I usually diminish in' diameter from its connection with the other coil, or make it n. conic frustunnas represented, the arm cZ extending from the lesser end of the coil. There is an advantage in this over the cylindrical coil, as it enables the spring to operate with more elasticity, or better, while being depressed by theslat.v Thearms support the spring and slat, so as to prevent disagreeable or undue oscillation of th'e slat. The loop or bow of the springA operates with the pin in 'the slat, as a convenient ,means of connecting the spring with the slat. Furthermore, the-)spring as made, enables'the slat to yield laterally and longitudinally, and to recover its position with great-facility, ,with little or noidanger of overstraining the spring, or rubbing on and wearing the mattress or 'bedding when on the slat.'

I claim the'springC, made substantially as described, vin, of the two helix-coils, the junetionloop, andthe arms projecting from such coils, the whole being arranged as specied.' I A I I also claim thepin 7c, inthe slat, in combination with the spring C, made and appliedto the slat, 'as specified.

I also claim the combination of the two supporting-screws@ e and loopsff, with' each spring' C made and applied to the slat, as specified. s I

Y I ABRAM WALLACE WRIGHT.

Witnesses ALBERT R. SAwYEn, .ALMoN' M. CAREY. 

